Concrete mold or form



T. DE LA MARE.

CONCRETE MOLD OR FORM. APPLICATION men APR.20, 1920.

Patented Aug. 30, 1921.

wm j z m 'glnventor l Witnesses Attorneys UNITED STATES PATENT OFFICE,

THOMAS DE IA A'RE, OF TOOELE, cram CONCRETE MOLD on FORM.

Specification of Letters Patent. Patented Aug. 192 1 2 Application filedApril 20, 1920. Serial NO. 375,825.

tion is the provision of a mold or form of novel construction, whichenables different diameters of conduits to be molded, thedeviceincludingconcentric core shells which are detachablyconnectedwhereby they may be used in conjunction for molding a conduit of largerdiameter, and whereby the inner shell may be withdrawn and used byitself for molding a conduit ofsmaller diameter;

Another object of the invention is the provision or" an applianceadapted for the construction of gutters, channels or sluices havingsides of different heights.

With the ioregoing andother objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it, being understood that changes in the preciseembodiment of the invention herein disclosed, can be made within thescope of what is claimed, without departing "from the spirit of theinvention.

The invention is illustrated in'the accompanying drawing, wherein:- 1

Figure 1 is a longitudinal section of the mold, portions being brokenaway.

Fig. 2 is an enlarged end view of the mold in contracted position, andillustrating the same used for forming a gutter having a low side and ahigh side, portions of the mold being shown in section. v Fig. 3 isaview similar to Fig. 2 illustrating the mold in expanded position, and

shOWiIlg the mold used for forming a channel or gutter having sides ofequal height.

Fig. 4- is asectional detail taken on line 4- 1 of Fig. 2. i

Fig. 5 is a sectional detail taken onthe line 55 of Fig. 1 p

. n carrying out the invention, thereis provided a cylindrical coreshell .1 constructed of resilient sheet metal, and'dividedlongitudinally, as at 2, the shell 1 having an expansive tension wherebyit will expand when released. i

The means for limiting the expansion of the'shell 1 and for contractingthe same, embodies a pair of hubs 3 in the opposite ends of the shell 1and connected by togglelinks lwiththe shell, A spindle 5 disposedaxially within the shell 1 has one end portion threaded through one ofthe hubs 3, and stem or rod 6 is threaded through the other hub 3 andits inner end is slidably received by a bore 7 provided in the other endof the spindle 5, wherebythe spindle 5 and stem 6 are slidablyconnected. ..The outer end of the stem 6' has an angularly projectingportion 8 to which is pivoted one end of the T-head 9 of a lever 10. Arod or link 11 has an angularly extending portion 12 at, one end pivotedto the other end of the head 9, and has an angularly extending portion13 at its other end pivoted to the spindle 5 near the remote endthereof, the rod 11 ex tending longitudinally within the shell 2.

When the lever 10 is swung at approxi mately right angles with the stem6, as seen in Fig. 1, the head 9 will act to push the stem 6 inwardlyand to pull the rod 11 in the opposite direction, so that the hubs 3 aremovedtoward one another to straighten out the toggle links 4, wherebythe shell 1 is expanded. lVhen the lever 10 is swung to this position,it will be swung into orbeyond its dead center, so that the lever 10will When the lever 10 is swung backwardly, the rod 11 hold its positionuntil released.

is pushed ahead by the lever 10 and the stem 6 is pulled outwardly,whereby the hubs 3 are separated, thus causing the links 4 to pullthewalls of the shell 1 inwardly,

thereby contracting the shell. i

When the shell 1 is of considerable length, additional means forcontrolling the expansion and contraction of the shell are em-. ployed.Thus, hubs 14 betweenthe, hubs 3 are disposed slidably upon the spindle5 to be guided thereby, and are, connected by toggle links 15 withtheshell 1, the same as the hubs 3 are. The hubs 14: are connected withthe respective end hubs 3 by means of 1 links 16, so that the hubs 14will'be moved toward and away from one another the same as the hubs 3.This causes the links 15 to act the Same as the linked, andjt heshellh'ient sheet metal.

closed in the said patent supra, and further description along this lineis not deemed necessary, since reference may be had to the said patent.

The invention also includes a second and larger cylindrical core shell17 divided longitudinally, as at 18, and constructed of resil- The shell17 is of larger diameter than the shell 1 so as to surround or envelopthe same concentrically. This shell 17 may be disposed over and attachedto the shell 1 when it is desired to mold a conduit of larger diameter,the same as a smaller conduit is molded by the shell 1. One end of theshell 1 is detachably connected to the respective end ofthe shell 17 bya plurality of radial stays 19 having angularly bent ends 20 lyingagainst the shells and detachably secured thereto by means of bolts orotherremovable securing elements 21. The other ends of the shells areconnected by a plurality of radial stays 22 having angularly extendingends 23 de tachably secured to the outer shell 1.7 by means of removablebolts or other securing elements 24. The inner ends of the stays 22 haveangular'ly extending hooks 25 receiving the respective end of the shell1, to provide a slip joint between the stays 22 and shell 1. Inassembling the two shells, the shell 1 is moved longitudinally withinthe shell 17 so as to slide between the stays 19, and the respective endof the shell 1 is then slipped into the hooks 25 so as to be held inplace by the stays 22. then bolted or fastened to the stays 19, whichwill hold the shell 1 in place within the shell 17. Then, when the shell1 is contracted, the shell 17 will be contracted therewith due to thefact that the stays l9 and 22 connect the two shells. lVhen the shell 1is allowed to expand, the shell 17 will also expand, which enables theshell 17 to be used for molding a conduit of larger diam eter the sameas a conduit'of smaller diameter is formed bythe shell 1. The spacebetween the edges of the shell 17 may be l flanges are provided withsuitable apertures 28 to cooperate with corresponding apertures 138provided 1n the sides of the shell The shell 1 is' The members 27 have'27 will facilitate the formation of the straight upstanding sides S ofthe gutter. It will be noted that the members 27 have vertical flangestangential with the shell 17 whereby the sides S of the gutter may beproperly formed, and the sides S may be formed to equal heights, bybringing their edges flush with the upper flanges of the members 27.

Members 27 of differentsizes may be 'used, and members 27 of'sma ller'sizes may be used in connection with the shell 1, the same as with theshell 17, for obvious reasons. The members 27 may also be adjustedrelative to the shell owing to the provision of the arrangement of theapertures 28 and28.

' lVhen it is desired to mold a gutter having a low side and a highside, an n standing plate 30 is attached to the u-prigt flange of one ofthe members 27, the plate 30 having apertures 31 "through which bolts 33may be engaged to engage "through certain apertures 28 of the respectivemember 27 for fastening the plate 30 in-place. The gutter G maytherefore be molded with a low side S", and with a high side S, sincethe plate 30forms an extension of the respective member 27 permittingthe respective side of the gutter to be formed higher than the oppositeside. This is especially valuable for-providing a curbing along one sideof the gutter.

The members or attachments '27 are removed from the'shell 17 when saidshell is employed for molding a conduit or the like.

Having thus described the invention, what is claimed as new is "1. In amold, a resilient contracti'ble shell, a second resilientcontractibleshell encircling the first mentioned shell and means for expanding andcontracting the said shells uniformly throughout their circumference.

2. In aniold, a contractible shell, means for contracting and expandingsaid shell throughout its circumference, a second contractible shellentirely surrounding the first mentioned shell and stays detachablyconnecting the shells whereby the second shell is contracted andexpanded uniformly throughout its circumference in conformity with theexpansion and contraction of the first mentioned shell.

means for detachably securing the other end of the first mentioned shellto the other stays.

4. Arnold comprising an inner cylindrical contractible shell dividedlongitudinally, an outer cylindrical contractible shell dividedlongitudinally and surrounding the inner shell, means within the innershell for contracting it, stays having their outer ends attached to theouter shell adjacent the ends thereof, the stays at one end having hooksat their inner ends for receiving the respective end of the inner shell,and means for detachably securing the inner ends of tlfielpther stays tothe other end of the inner s e 5. In a mold, a contractible shell, apair of end hubs therein, hubs between said hubs, toggle linksconnectingj'all of said'hubs and the shell, a spindle attached to one ofthe ends hubs, the second mentioned hubs being slidable upon thespindle, a stem engaged with, the other end hub and having a slidingconnection with the spindle, a lever pivoted to the stem, and a linkconnecting said lever and the spindle.

6. In a mold, a cylindrical shell, angle members having their flangesresting against opposite sides of the shell, means for detachablysecuring said members to the shell, and a plate attachable to one sideof one of said members, the plate and said member being provided withmeans whereby adjustment between the two elements is effected.

7. In a mold, a cylindrical shell, angle members on opposite sides ofthe shell, said members having their sides resting against the shell,means for detachably securing said members to the shell, and a plateattachable to one side of one of said members toform an extensionthereof.

8. In a mold, a cylindrical shell, an angl member having its sidesresting against the shell with one side arranged tangentially relativeto the shell, means for detachably securing said member to the shell,and a plate detachably secured to said side to form an-extensionthereof.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

THOMAS DE LA MARE.

